How to manually make boot for your USB using GRUB boot-loader or Syslinux or any boot-loader you prefer for any Rescue ISO , any OS ISO ?

please use this tool http://www.pendrivelinux.com/  OR ultra iso and reboot the system to bootloader select the media, if u are using pen dive select it, OR if u are using external hard disk select it, thats all.......then UR OS will start from other source, so u can use it as portable

Hello,

in internet you can find many images today. download which you need and restore using "ultra iso" or "USB Image Tool".

u call that a question :) just put the iso on the Usb drive and then go to the bios to check the boot u will find that the first drive to boot from is the Hard disk change it to the Usb Flash Drive and done :) or u can download a software from the internet called usb boot